Pros
IGN is a big company - 300+ strong, mature and profitable - which brings lots of pros. The team has varied experience in and around the industry so there is always someone to learn from. The site is without a doubt the largest and most influential in the games business, which means you will inevitably be well-connected should you choose to be. The product and tech teams are strong and agile so you will be given the rope to explore... and potentially hang yourself. The leadership team has really changed the culture in the past few years and I find IGN to be relearning how to be nimble and innovative again after several years of post-acquisition torpor. It is refreshing.
Cons
IGN is a big company! It can be hard to make yourself known amongst senior leaders. It can also be hard to turn a big ship. Recognizing a trend and making adjustments can be cumbersome given the size of the org. IGN is owned by News Corp so if you are looking for equity and a big payday, it ain't the place. There is some in-fighting between divisions and teams, on occasion. Politics are bound to exist in an organization so large.